I would rather have had Johnny in the finals over Kaitlyn. She's a good dancer, but something about her just leaves me cold. I can't explain it. I loved Johnny and Britt's partnership and I just enjoy Johnny in general.
I would be fine with any of the other 3 winning. (I didn't pick any of them to win or even get to the finals when the cast was announced - go figure!) I didn't realize Nev would be as good as he is, and he's been consistently so. Nelly has visibly improved during the season, he works hard and he's taking it seriously, not just coasting along knowing the size of his fan base. And Justina is just a joy to watch.
The change I really hope they keep for future seasons is not having the troupe involved in every single dance. I get that it was made by circumstances and not necessarily by choice, but it's been refreshing to have the focus on the star and partner, not all sorts of backup dancers.